Excess Soil Management: Successes, Challenges, and Lessons - - PDF document

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Jul 17, 2023 570 likes •695 views

11/27/2015 Excess Soil Management: Successes, Challenges, and Lessons Learned Krista Barfoot Ph.D., C.Chem, QP RA Outline Case Studies Soil Importation, Stockpiling,

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11/27/2015 1

ExcessSoilManagement:Successes, Challenges,andLessonsLearned

KristaBarfootPh.D.,C.Chem,QPRA

CaseStudies– SoilImportation,Stockpiling,Matching
Successes
Challenges
LessonsLearned
FutureConsiderations

Outline

SLIDE 2

11/27/2015 2

CaseStudies– SoilImportation

2yeartimeperiodtargeted 100,000sm3 required RSCsite Contractorresponsiblefor importation

CaseStudies– SoilImportation

Approach SourceSites •

Tendercallforsources

Infrastructure projectswithin2kmofsite
Owneridentifiedadditionalsource

Sampling

Parametersforsamplingidentifiedvia

PhaseOnetypeassessmentbyQP

Insituandexsitu;preimportation
FrequencyperO.Reg.153/04

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Testingpacevsimportation
Trackingofsoilsandresults
Problematicparameters

– EC,SAR – Metals – PHCs

CaseStudies – SoilImportation CaseStudies– SoilStockpiling

LakeviewWC StockpileSite Hanlan Feedermain

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CaseStudies– SoilStockpiling

Approach MOECC

Consultation;firststockpile siteunderBMP

Design

Assesscapacity andimplicationsforneighbouring

areas

Standard

ConfinedFillMaterialCriteria(TableC1)

Sampling Frequency

SourceSiteandAuditProgram;QPdecisionper

MOECCBMPbasedonsource/risk

AuditingatStockpilesiteallowedvisualversus

analyticalforlowrisksources

Contractor

Responsiblefortestingandtrackingprogram
8
Rock,soil10mdepth
1sampleevery3,000m3
Auditdailyorweeklyby

visualinspection

CaseStudies– SoilStockpiling

LowRiskFill

Shallowrockandsoil

meetingcriteriainsitu

1sampleevery1,000m3
Audit1/10,000m3

MediumRiskFill

Soil<1.5m,nonnative,

untestedAPEC

1sampleevery300m3
Audit1/3,000m3

HighRiskFill

Contaminatedsites;

unknownsoilquality

1sampleevery160m3
Audit1/800m3

KnownHighRiskFill

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ECAforstormwater interceptor
Impermeablesurface
Problematicparameters

– EC,HWSBoron

Accountabilityforfailed

samples,rejectedsoil

CaseStudies – SoilStockpiling

Contract;

demonstratingcost savings

CaseStudies– SoilMatching

WindsorEssexParkway Amherstburg

3.5millionm3 offillgenerated
Contractor solelyresponsiblefor

soildisposal

RA/remediationproject
1millionm3 offillneededto

infillquarryandcapsite

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CaseStudies– SoilMatching

Approach Clients

Willingnesstoconnectanddiscussionoptions

Quality

Testingindicatedappropriate soilqualityfor

receivingsite

Time

Constructionschedulesaligned

Volume

Onesourcecouldsupplyentirecapping
peration
12
Negotiatingcontract
Closerreceivingsites
Demonstratingcost

savingstocontractor

CaseStudies – SoilMatching

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LessonsLearned

Management Technical Contractual

LessonsLearned

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LessonsLearned

ECAs Testingvs importing

Management

Communication Schedule

MOECC Environmental andconstruction teams

LessonsLearned Natural parameters Statistical analysis

Technical

Reuseand standards

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LessonsLearned Clarityonpartyresponsible forsoilquality Rejectedsoil materialplanning Tenderingprocess, contractterms

Contractual

FutureConsiderations

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FutureConsiderations– TraditionalApproach

Excess Soil/Sediment Assessment Onesetof Standards Imported Meets Doesn’t Meet Landfill

FutureConsiderations– FutureApproach

Excess Soil/Sediment Assessment Meets Landfill MultipleapplicableCriteria aligningwithplacement/reuse Importand placeper criteria; complete tracking Doesn’tMeet Amendment, Remediation Doesn’tMeet

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FutureConsiderations– FutureApproach

Excess Soil/Sediment Assessment Meets Landfill MultipleapplicableCriteria aligningwithplacement/reuse Importand placeper criteria; complete tracking Doesn’tMeet Amendment, Remediation Doesn’tMeet

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